The present publication presents the Sphoṭasiddhi by Maṇḍana Miśra, an exposition of his theory on sphoṭa, accompanied by a translation and a commentary in French. According to this doctrine, it is necessary to presuppose, in order to account for the process by which a unit of sense can emerge from the jumble of letters and words that is speech, the existence of a sound-entity, which is the support and raison d’etre of language. There is, in this view, first a sphoṭa of the word, a word-entity the analysis of whose constituent letters is not possible and which bears the sense of the word. Next follows a sphoṭa of the phrase, which again cannot be analysed in words, and which alone can lend unity of sense to the phrase. Maṇḍana Miśra is solely interested in the sphoṭa of the word. This Sanskrit philosophical text belongs to the Mīmāṃsā system.